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Finding the Fourth Proportional to 381,561.05, 526,527.90 and 211,781.81

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Solution

The fourth proportional to 381,561.05, 526,527.90 and 211,781.81 is: 292,244.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,561.05 : 526,527.90 = 211,781.81 : x
  2. Step 2: Convert to fraction form
    381,561.05/526,527.90 = 211,781.81/x
  3. Step 3: Cross multiply
    381,561.05x = 526,527.90 × 211,781.81
  4. Step 4: Simplify right side
    381,561.05x = 111,509,032,993.82
  5. Step 5: Solve for x
    x = 111,509,032,993.82/381,561.05
  6. Step 6: Final answer
    x = 292,244.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.